Job Summary
We are seeking a Senior Backend Developer to design implement and refactor core platform services supporting federated authentication and a multi-entity vehicle management system. This role focuses on integrating Firebase-based identity restructuring backend data models and modernizing API layers to support scalable account vehicle and profile relationships.
Responsibilities
Data Model & Persistence Layer
Design and implement new domain entities including user_account and vehicle_profile to support federated identity mapping.
Refactor existing schemas (e.g.vehicle_enrollment) to separate vehicle-level and profile-level concerns.
Develop and execute database migrations including:
Table creation column restructuring and foreign key repointing
Index updates and performance optimizations
Implement data backfill and reconciliation logic for existing records including consolidation of vehicle and profile relationships.
API & Middleware Development
Refactor REST APIs to support:
Account-level vehicle-level and profile-level operations
Updated relationships between entities (account-vehicles-profiles)
Implement cross-cutting concerns:
Request interceptors/filters for authentication and context resolution
Shared request context updates (vehicleProfileId userAccountId)
Enhance API contracts OpenAPI documentation and error handling to reflect new data model and authentication patterns.
Authentication & Security Integration
Integrate Firebase Authentication and implement ID-token validation and claim extraction.
Transition from client-credential-based authentication (e.g. Keycloak) to federated identity model.
Implement account-ownership authorization to enforce access control across account vehicle and profile scopes.
Service Layer & Business Logic
Rework service logic to support:
Vehicle enrollment and profile creation flows
Signing key management and rotation
Payment/card binding at profile level
Update transaction processing logic to distinguish between:
Profile-based signed transactions
Vehicle-level fallback scenarios
Implement account-level operations such as:
Full account closure with cascading vehicle unenrollment and partial failure handling
Work with third-party integrations including:
Firebase (identity provider)
MasterCard SRC (card tokenization and identity binding)
Payment middleware and BOS systems
Ensure consistency of entity mapping across internal services and external callbacks.
Testing & Quality Engineering
Develop and execute integration and regression test plans across:
Updated schema and foreign key relationships
API endpoints and authentication flows
Update test teardown and data lifecycle logic to reflect new entity relationships.
Strong experience in backend development (Java/Spring Boot or similar frameworks)
Proven expertise in:
REST API design and refactoring
Relational database design schema migrations and indexing
Authentication/authorization frameworks (JWT OAuth federated identity)
Experience implementing middleware components such as interceptors filters and request contexts
Familiarity with cloud-based identity providers (e.g. Firebase Auth OAuth providers)
Experience with payment systems and tokenization (e.g. MasterCard SRC or similar)
Prior work on multi-tenant or hierarchical data models (account-asset-profile)
Knowledge of event-driven integrations and callback-based third-party systems
Experience with API gateways and distributed security validation patterns
Strong system design and data modeling skills
Ability to manage complex refactoring across multiple layers (DB API service)
Attention to data integrity security and backward compatibility
Effective collaboration across architecture QA and integration teams
End-to-end ownership of a major platform refactor spanning:
Data model redesign
Authentication transformation
API and service re-architecture
Direct impact on enabling scalable multi-vehicle multi-profile user experiences
Critical role in aligning platform architecture with federated identity standards and payment constraints
Certifications Required
not required
About Cognizant’s IoT Practice:
Intelligent, IoT-enabled products will soon result in the proliferation of data and disrupt virtually all industries. To be successful, both large and small companies must leverage IoT capabilities by designing modern products that fundamentally connect people with processes. Within Cognizant IOT, we engineer industry-aligned, IoT-enabled products that merge industry needs with human drivers. Our intelligent products will revolutionize experiences and result in exciting, transformative outcomes. Without human-centered thinking, connected products are just standalone things—but with it, our modern connected products facilitate a unified way of life enjoyed by all.
- Please note, this role is not able to offer visa transfer or sponsorship now or in the future*
Applications will be accepted until July 31st , 2026
LI#- #LI-SC6
Compensation & Benefits
$133,000 – $180,000 per year
Bonus + Comprehensive Benefits
Additional Information
Onsite role
- ️ Visa sponsorship is not available now or in the future. Candidates requiring sponsorship will not be considered.
Benefits : Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:
- Medical/Dental/Vision/Life Insurance
- Paid holidays plus Paid Time Off
- 401(k) plan and contributions
- Long-term/Short-term Disability
- Paid Parental Leave
- Employee Stock Purchase Plan
